CN114669331A - Fenton-like reagent type non-liquid catalyst and preparation method and application thereof - Google Patents
Fenton-like reagent type non-liquid catalyst and preparation method and application thereof Download PDFInfo
- Publication number
- CN114669331A CN114669331A CN202210353891.3A CN202210353891A CN114669331A CN 114669331 A CN114669331 A CN 114669331A CN 202210353891 A CN202210353891 A CN 202210353891A CN 114669331 A CN114669331 A CN 114669331A
- Authority
- CN
- China
- Prior art keywords
- liquid catalyst
- soil
- rhodamine
- edta
- fenton
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 90
- 239000007788 liquid Substances 0.000 title claims abstract description 81
- 239000003153 chemical reaction reagent Substances 0.000 title abstract description 17
- 238000002360 preparation method Methods 0.000 title abstract description 15
- 239000002689 soil Substances 0.000 claims abstract description 41
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229940043267 rhodamine b Drugs 0.000 claims abstract description 40
- 239000004480 active ingredient Substances 0.000 claims abstract description 14
- FHVDTGUDJYJELY-UHFFFAOYSA-N 6-{[2-carboxy-4,5-dihydroxy-6-(phosphanyloxy)oxan-3-yl]oxy}-4,5-dihydroxy-3-phosphanyloxane-2-carboxylic acid Chemical compound O1C(C(O)=O)C(P)C(O)C(O)C1OC1C(C(O)=O)OC(OP)C(O)C1O FHVDTGUDJYJELY-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229940072056 alginate Drugs 0.000 claims abstract description 12
- 235000010443 alginic acid Nutrition 0.000 claims abstract description 12
- 229920000615 alginic acid Polymers 0.000 claims abstract description 12
- 239000013522 chelant Substances 0.000 claims abstract description 7
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 19
- 239000000243 solution Substances 0.000 claims description 16
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 claims description 15
- 229910001447 ferric ion Inorganic materials 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 11
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical group CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 8
- 235000010413 sodium alginate Nutrition 0.000 claims description 8
- 229940005550 sodium alginate Drugs 0.000 claims description 8
- 239000000661 sodium alginate Substances 0.000 claims description 8
- 239000010865 sewage Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 4
- 239000008055 phosphate buffer solution Substances 0.000 claims description 3
- 239000002351 wastewater Substances 0.000 claims description 3
- 239000012266 salt solution Substances 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 230000015556 catabolic process Effects 0.000 abstract description 23
- 238000006731 degradation reaction Methods 0.000 abstract description 23
- 230000007935 neutral effect Effects 0.000 abstract description 9
- 230000002378 acidificating effect Effects 0.000 abstract description 7
- 239000003344 environmental pollutant Substances 0.000 abstract description 5
- 231100000719 pollutant Toxicity 0.000 abstract description 5
- 230000003197 catalytic effect Effects 0.000 abstract description 3
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 230000000593 degrading effect Effects 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- -1 iron ions Chemical class 0.000 description 6
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 239000012153 distilled water Substances 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 3
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 3
- 239000002957 persistent organic pollutant Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 238000003900 soil pollution Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010919 dye waste Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000012028 Fenton's reagent Substances 0.000 description 1
- 235000006040 Prunus persica var persica Nutrition 0.000 description 1
- 240000006413 Prunus persica var. persica Species 0.000 description 1
- 238000009303 advanced oxidation process reaction Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical group OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000002137 ultrasound extraction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/16—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
- B01J31/22—Organic complexes
- B01J31/2204—Organic complexes the ligands containing oxygen or sulfur as complexing atoms
- B01J31/2208—Oxygen, e.g. acetylacetonates
- B01J31/2226—Anionic ligands, i.e. the overall ligand carries at least one formal negative charge
- B01J31/223—At least two oxygen atoms present in one at least bidentate or bridging ligand
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/14—Soil-conditioning materials or soil-stabilising materials containing organic compounds only
- C09K17/18—Prepolymers; Macromolecular compounds
- C09K17/32—Prepolymers; Macromolecular compounds of natural origin, e.g. cellulosic materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2531/00—Additional information regarding catalytic systems classified in B01J31/00
- B01J2531/80—Complexes comprising metals of Group VIII as the central metal
- B01J2531/84—Metals of the iron group
- B01J2531/842—Iron
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Water Supply & Treatment (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to the technical field of wastewater treatment, and discloses a Fenton-like reagent type non-liquid catalyst, and a preparation method and application thereof. The non-liquid catalyst comprises a carrier and an active ingredient, wherein the carrier comprises alginate gel, and the active ingredient comprises Fe3+-EDTA chelate. The non-liquid catalyst is a supported catalyst and has stable catalytic performance. The non-liquid catalyst has good adaptability to the soil in acidic, neutral and alkaline environments (such as pH of 3-10), and can catalyze and degrade pollutants in acidic, neutral and alkaline soils, particularlyExcept that the degradation rate of rhodamine B can exceed 90 percent. In addition, the non-liquid catalyst can be recycled.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a Fenton-like reagent type non-liquid catalyst, and a preparation method and application thereof.
Background
Soil pollution is difficult to observe directly, and soil samples are often required to be detected and analyzed. The soil often lags long from producing contamination to environmental problems. Many soil pollutions, such as refractory organic matters and heavy metal pollution, are difficult to recover naturally once occurring, and have the characteristics of high treatment cost and long repair period. Therefore, the soil pollution has the characteristics of concealment, hysteresis, high restoration cost and the like.
The dye brings rich colors to people's life and produces great economic benefits, but also produces a great deal of dye waste water which is harmful to the environment. The dye wastewater has large water quality change and large color change, and belongs to industrial wastewater difficult to degrade biochemically. The random discharge of dye waste water causes environmental pollution. Rhodamine B is a common artificially synthesized cationic organic dye, the aqueous solution of which is bright peach red, and the rhodamine B is widely applied to the industries of textile dyeing, fireworks and firecrackers, colored glass and the like. Rhodamine B released into the environment is difficult to biodegrade or self-degrade under natural conditions. Therefore, the purification treatment of the soil and the wastewater polluted by the rhodamine B dye is difficult.
The soil polluted by organic dye is usually purified by chemical oxidation. The chemical oxidation method has the capability of quickly removing toxic and harmful organic compounds which are difficult to biodegrade in the soil and quickly reducing the pollutant level in the soil. Meanwhile, the advanced oxidation process has the advantages of short reaction time, high removal efficiency, simplicity in operation and the like, and becomes one of mainstream methods for soil remediation, wherein a Fenton/Fenton-like oxidation system is more applied. The traditional Fenton method can only degrade organic pollutants in a low pH range of 3-4 (namely, the traditional Fenton method uses a catalyst with a pH of 3-4 to play a catalytic role), and the pH of natural soil is generally neutral or weakly alkaline and has a certain buffering capacity on acid and alkali. This greatly limits the purification of contaminated soil by the fenton/fenton-like oxidation system of the prior art. And the catalyst adopted in the prior art is liquid, which is not beneficial to the utilization and recovery of the catalyst.
Therefore, it is desirable to provide a catalyst capable of adapting to a wide pH range, which can adapt to a neutral or alkaline soil environment and has a good purification effect on pollutants in contaminated soil.
Disclosure of Invention
The present invention has been made to solve at least one of the above-mentioned problems occurring in the prior art. Therefore, the invention provides a Fenton reagent-like non-liquid catalyst, a preparation method and an application thereof, wherein the non-liquid catalyst has good adaptability to soil in acidic, neutral and alkaline environments (for example, the pH value is 3-10), and can catalyze and degrade pollutants in the acidic, neutral and alkaline soil, and particularly the degradation rate of rhodamine B can exceed 90%.
In a first aspect of the invention, a fenton-like reagent type non-liquid catalyst is provided.
Specifically, the non-liquid catalyst of the Fenton-like reagent type comprises a carrier and an active ingredient, wherein the carrier comprises alginate gel, and the active ingredient comprises Fe3+-EDTA (ethylenediaminetetraacetic acid) chelate.
Preferably, the non-liquid catalyst is spheroidal.
Preferably, the carrier is sodium alginate gel.
The second aspect of the invention provides a preparation method of a Fenton-like reagent type non-liquid catalyst.
Specifically, the preparation method of the non-liquid catalyst of the Fenton-like reagent comprises the following steps:
and adding an alginate solution into a mixture containing EDTA and ferric ions, and solidifying to obtain the non-liquid catalyst.
Preferably, the mass concentration of the alginate solution is 1-5%; further preferably, the mass concentration of the alginate solution is 2.5-3.5%; more preferably, the alginate solution has a mass concentration of 3%.
Preferably, the adding process comprises the following steps: the alginate solution was added drop-wise via syringe to the mixture containing EDTA and ferric ions.
Preferably, in the mixture containing EDTA and ferric ions, the concentration of the ferric ions is 50-150 mmol/L; further preferably, the concentration of the iron ions is 80-120 mmol/L.
Preferably, in the mixture containing EDTA and ferric ion, when the concentration of the ferric ion is 50-150mmol/L, the content of EDTA is 0.3-2g, preferably 0.5-1.6 g.
Preferably, the curing temperature is 10-40 ℃; further preferably, the curing temperature is room temperature.
Preferably, the curing time is 8 to 15 hours; it is further preferred that the curing time is 10 to 12 hours.
Preferably, after the solidification, cleaning is further performed, and the cleaning process is performed by using distilled water.
The preparation method of the invention can prepare the gel-like granular non-liquid catalyst at normal temperature.
In a third aspect of the invention, the application of a non-liquid catalyst similar to a Fenton reagent is provided.
The Fenton-like reagent type non-liquid catalyst is applied to soil or sewage treatment.
Specifically, the use method of the non-liquid catalyst of the Fenton-like reagent type comprises the following steps:
mixing soil or sewage H2O2Mixing the solution, EDTA, ferric salt and phosphate buffer solution, adding the non-liquid catalyst, and reacting.
Preferably, the non-liquid catalyst is removed after the reaction is completed. The non-liquid catalyst can be recycled.
Preferably, the soil or sewage comprises rhodamine B, alkaline red or Jianna green.
Preferably, the reaction is carried out at a pH of 3 to 10; preferably, the pH is 3.5 to 8.5.
Preferably, said H2O2The concentration of the solution is 1.2-3 mol/L; preferably 1.5-2.5 mol/L.
Preferably, the mass ratio of EDTA to the non-liquid catalyst is 0.1-0.8 g: (100-1500) mg; preferably 0.2 to 0.6 g: (300- > 1000) mg.
Preferably, the concentration of iron ions in the iron salt in the mixed reactants is 20-150 mmol/L; preferably 50 to 100 mmol/L.
When the amount or the concentration of each component in the non-liquid catalyst is within the above range during the use process, the degradation rate of the non-liquid catalyst on organic pollutants (such as rhodamine B) in soil or sewage can exceed 90%, and if the amount or the concentration of each component is not within the above range, the degradation rate on the organic pollutants (such as rhodamine B) in soil or sewage is reduced, for example, 80%.
Compared with the prior art, the invention has the following beneficial effects:
the non-liquid catalyst comprises a carrier and an active ingredient, wherein the carrier comprises alginate gel, and the active ingredient comprises Fe3+-EDTA (ethylenediaminetetraacetic acid) chelate. The non-liquid catalyst is a supported catalyst and has stable catalytic performance. The non-liquid catalyst has good adaptability to soil in acidic, neutral and alkaline environments (for example, the pH value is 3-10), and can catalyze and degrade pollutants in acidic, neutral and alkaline soil, and particularly the degradation rate of rhodamine B can exceed 90%. In addition, the non-liquid catalyst can be recycled.
Drawings
FIG. 1 is a physical diagram of a non-liquid catalyst prepared in example 1 of the present invention;
FIG. 2 is a kinetic curve of the non-liquid catalyst prepared in example 1 of the present invention degrading rhodamine B in contaminated soil at pH 3.5;
FIG. 3 is a kinetic curve of the non-liquid catalyst prepared in example 1 of the present invention degrading rhodamine B in contaminated soil at pH 6.5;
fig. 4 is a kinetic curve of the non-liquid catalyst prepared in example 1 of the present invention degrading rhodamine B in contaminated soil at pH 8.5.
Detailed Description
In order to make the technical solutions of the present invention more apparent to those skilled in the art, the following examples are given for illustration. It should be noted that the following examples are not intended to limit the scope of the claimed invention.
The starting materials, reagents or apparatuses used in the following examples are conventionally commercially available or can be obtained by conventionally known methods, unless otherwise specified.
Example 1: preparation of non-liquid catalyst of Fenton-like reagent type
A Fenton reagent-like non-liquid catalyst comprises a carrier and an active ingredient, wherein the carrier is sodium alginate gel, and the active ingredient is Fe3+-EDTA (ethylenediaminetetraacetic acid) chelate.
A preparation method of a Fenton-like reagent type non-liquid catalyst comprises the following steps:
a sodium alginate solution with the mass concentration of 3% is added dropwise into a mixture containing EDTA and iron ions (the amount of EDTA in the mixture is 0.39g, the concentration of the iron ions is 67.12mmol/L, and the iron ions are introduced in the form of ferric chloride) through a syringe, solidification is carried out for 12 hours at the temperature of 20 ℃, and then the product is washed by distilled water to prepare the non-liquid catalyst.
FIG. 1 is a physical diagram of a non-liquid catalyst prepared in example 1 of the present invention; as can be seen from FIG. 1, the non-liquid catalyst prepared in the examples of the present invention is in the form of spheroidal particles.
Example 2: preparation of non-liquid catalyst of Fenton-like reagent type
A Fenton reagent-like non-liquid catalyst comprises a carrier and an active ingredient, wherein the carrier is sodium alginate gel, and the active ingredient is Fe3+-EDTA (ethylenediaminetetraacetic acid) chelate.
The non-liquid catalyst is spheroidal.
A preparation method of a Fenton-like reagent type non-liquid catalyst comprises the following steps:
adding a sodium alginate solution with the mass concentration of 3% into a mixture containing EDTA and ferric ions (the amount of EDTA in the mixture is 0.5g, the concentration of the ferric ions is 100mmol/L, and the ferric ions are introduced in the form of ferric chloride) dropwise through a syringe, solidifying for 12 hours at the temperature of 20 ℃, and then cleaning the product by using distilled water to prepare the non-liquid catalyst.
Example 3: preparation of non-liquid catalyst of Fenton-like reagent type
A Fenton reagent-like non-liquid catalyst comprises a carrier and an active ingredient, wherein the carrier is sodium alginate gel, and the active ingredient is Fe3+-EDTA (ethylenediaminetetraacetic acid) chelate.
The non-liquid catalyst is spheroidal.
A preparation method of a Fenton-like reagent type non-liquid catalyst comprises the following steps:
adding a sodium alginate solution with the mass concentration of 3% into a mixture containing EDTA and ferric ions (the amount of EDTA in the mixture is 0.1g, the concentration of the ferric ions is 120mmol/L, and the ferric ions are introduced in the form of ferric chloride) dropwise through a syringe, solidifying for 12 hours at 25 ℃, and then cleaning the product by using distilled water to prepare the non-liquid catalyst.
Example 4: use of non-liquid catalysts
The method for extracting rhodamine B from the polluted soil comprises the following specific steps:
(1) putting 1g of contaminated soil into a 50mL centrifuge tube, adding 10mL deionized water, and uniformly oscillating for 6 hours to obtain a suspension;
(2) adding 10mL of methanol into the suspension, and performing ultrasonic extraction for 30 minutes;
(3) centrifuging at 8000 rpm for 5min for separation, and collecting supernatant;
(4) repeating the steps (2) and (3) and combining the solution to be detected twice;
(5) after diluting with methanol to a constant volume, the concentration of rhodamine B was measured at 554nm using an ultraviolet spectrophotometer.
5g of contaminated soil is put into a 50mL centrifuge tube, and H with the total volume of 30mL and 2.05mol/L is respectively added2O2、0.39g EDTA、67.12mmol/L FeCl3500mg of the non-liquid catalyst prepared in example 1 was added, and pH stabilization was performed with a phosphate buffer solution to maintain the reaction system pH at 3.5; setting 6 same samples according to the conditions, oscillating at constant temperature at an oscillation rate of 200 revolutions per minute, controlling the reaction time of 10.0min (minutes), 30.0min, 40.0min, 56.27min, 68.0min and 85.0min respectively, immediately taking out the non-liquid catalyst after the time is up, and adding 5mL of tert-butyl alcohol to quench the reaction; the concentration of the remaining rhodamine B in the mixture after the reaction was measured by using an ultraviolet spectrophotometer, the removal rate of the non-liquid catalyst prepared in example 1 on the rhodamine B in the contaminated soil was calculated, and a degradation kinetic curve was obtained, with the result shown in fig. 2.
FIG. 2 is a kinetic curve of the non-liquid catalyst prepared in example 1 of the present invention degrading rhodamine B in contaminated soil at pH 3.5; as can be seen from fig. 2, when the pH of the reaction system is 3.5, the non-liquid catalyst prepared in example 1 of the present invention degrades rhodamine B in the contaminated soil rapidly, and the degradation rate of rhodamine B is 98.1% in 56.27min and 98.7% in 68 min.
Example 5: use of non-liquid catalysts
Example 5 is different from example 4 only in that the pH of the reaction system is maintained at 6.5, the rest of the process is the same as example 4, the removal rate of rhodamine B in the contaminated soil by the non-liquid catalyst prepared in example 1 is calculated, and a degradation kinetic curve is obtained, and the result is shown in fig. 3.
FIG. 3 is a kinetic curve of the non-liquid catalyst prepared in example 1 of the present invention degrading rhodamine B in contaminated soil at pH 6.5; as can be seen from fig. 3, when the pH of the reaction system is 6.5, the non-liquid catalyst prepared in example 1 of the present invention degrades rhodamine B in the contaminated soil rapidly, and at 56.27min, the degradation rate of rhodamine B is 95.0%, and at 68min, the degradation rate of rhodamine B is 98.4%.
Example 6: use of non-liquid catalysts
Example 6 is different from example 4 only in that the pH of the reaction system is maintained at 8.5, the rest of the process is the same as example 4, the removal rate of rhodamine B in the contaminated soil by the non-liquid catalyst prepared in example 1 is calculated, and a degradation kinetic curve is obtained, and the result is shown in fig. 4.
FIG. 4 is a kinetic curve of the non-liquid catalyst prepared in example 1 of the present invention degrading rhodamine B in contaminated soil at pH 8.5; as can be seen from fig. 4, when the pH of the reaction system is 8.5, the non-liquid catalyst prepared in example 1 of the present invention degrades rhodamine B in the contaminated soil rapidly, and at 56.27min, the degradation rate of rhodamine B is 92.1%, and at 68min, the degradation rate of rhodamine B is 98.6%.
As can be seen from the above examples 4-6, the degradation rate of the non-liquid catalyst prepared by the invention to rhodamine B in the pH range of 3.5-8.5 exceeds 92% at 56.27min, and exceeds 98% at 68 min. Namely, the non-liquid catalyst prepared by the invention has good degradation rate to organic matters in the polluted soil no matter in acidic, neutral or alkaline environment.
Comparative example 1
Compared with example 1, the catalyst of comparative example 1 was prepared by substituting nitrilotriacetic acid for EDTA in example 1 in comparative example 1, and then the degradation rate of rhodamine B of the catalyst prepared in comparative example 1 was tested according to the method of example 5, and at 56.27min, the degradation rate of rhodamine B was 43.6%, and at 68min, the degradation rate of rhodamine B was 50.7%.
Comparative example 2
In comparison with example 1, in comparative example 2 in which EDTA in example 1 was replaced with diethyltriaminepentaacetic acid, the catalyst in comparative example 2 was prepared, and then the catalyst prepared in comparative example 2 was tested for the degradation rate of rhodamine B according to the method of example 5, the degradation rate of rhodamine B was 45.6% at 56.27min, and the degradation rate of rhodamine B was 54.5% at 68 min.
In addition, in the technical scheme of the invention, the non-liquid catalyst with the effect equivalent to that of the embodiment 1 can be prepared by changing the using amount of each substance component, for example, the concentration of EDTA and iron ions in the preparation process of the non-liquid catalyst. The degradation rate of the non-liquid catalyst prepared in the above examples 2 to 3 on rhodamine B was also equivalent to the degradation rate of the non-liquid catalyst prepared in example 1 on rhodamine B.
Claims (10)
1. A non-liquid catalyst, characterized in that the non-liquid catalyst comprises a carrier and an active ingredient, the carrier comprises alginate gel, and the active ingredient comprises Fe3+-EDTA chelate.
2. The non-liquid catalyst of claim 1, wherein the non-liquid catalyst is spheroidal.
3. A non-liquid catalyst as claimed in claim 1 wherein the carrier is sodium alginate gel.
4. A method for preparing a non-liquid catalyst according to any one of claims 1 to 3, comprising the steps of:
and adding an alginate solution into a mixture containing EDTA and ferric ions, and solidifying to obtain the non-liquid catalyst.
5. The method according to claim 4, wherein the alginate solution is present in a concentration of 1-5% by mass.
6. The method of claim 4, wherein the adding is carried out by: the alginate solution was added drop-wise via syringe to the mixture containing EDTA and ferric ions.
7. The method according to claim 4, wherein the mixture containing EDTA and ferric ion has a concentration of 50-150mmol/L and a content of EDTA of 0.3-2 g.
8. Use of a non-liquid catalyst according to any one of claims 1 to 3 in soil or sewage treatment.
9. A method of using a non-liquid catalyst according to any one of claims 1 to 3, comprising the steps of:
mixing soil or sewage H2O2Mixing the solution, EDTA, ferric salt and phosphate buffer solution, adding the non-liquid catalyst, and reacting.
10. The use of claim 9, wherein said soil or wastewater comprises rhodamine B, basic red or jianna green; the reaction is carried out at a pH of 3 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210353891.3A CN114669331A (en) | 2022-04-02 | 2022-04-02 | Fenton-like reagent type non-liquid catalyst and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210353891.3A CN114669331A (en) | 2022-04-02 | 2022-04-02 | Fenton-like reagent type non-liquid catalyst and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114669331A true CN114669331A (en) | 2022-06-28 |
Family
ID=82077847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210353891.3A Pending CN114669331A (en) | 2022-04-02 | 2022-04-02 | Fenton-like reagent type non-liquid catalyst and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114669331A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102909073A (en) * | 2012-10-12 | 2013-02-06 | 浙江理工大学 | Preparation method and application of heterogeneous Fenton-like catalyst |
| CN109589995A (en) * | 2019-01-22 | 2019-04-09 | 河北师范大学 | A kind of catalyst and its application method of fast degradation Organic Pollutants in Wastewater |
| CN110548543A (en) * | 2019-09-16 | 2019-12-10 | 中国科学院生态环境研究中心 | polymer gel Fenton catalyst, preparation method and application thereof |
| CN111036297A (en) * | 2019-12-16 | 2020-04-21 | 浙江大学 | Carbon fiber modified based on iron alginate, preparation method and application |
| CN113828314A (en) * | 2021-10-25 | 2021-12-24 | 广西科学院 | Method for preparing starch carbon Fenton catalyst based on EDTA chelation technology |
-
2022
- 2022-04-02 CN CN202210353891.3A patent/CN114669331A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102909073A (en) * | 2012-10-12 | 2013-02-06 | 浙江理工大学 | Preparation method and application of heterogeneous Fenton-like catalyst |
| CN109589995A (en) * | 2019-01-22 | 2019-04-09 | 河北师范大学 | A kind of catalyst and its application method of fast degradation Organic Pollutants in Wastewater |
| CN110548543A (en) * | 2019-09-16 | 2019-12-10 | 中国科学院生态环境研究中心 | polymer gel Fenton catalyst, preparation method and application thereof |
| CN111036297A (en) * | 2019-12-16 | 2020-04-21 | 浙江大学 | Carbon fiber modified based on iron alginate, preparation method and application |
| CN113828314A (en) * | 2021-10-25 | 2021-12-24 | 广西科学院 | Method for preparing starch carbon Fenton catalyst based on EDTA chelation technology |
Non-Patent Citations (2)
| Title |
|---|
| 吴耀国;冯文璐;王秋华;陈培榕;: "Fenton法中拓宽pH范围的方法", 现代化工, vol. 28, no. 03, pages 87 - 90 * |
| 李孟宣: ""优化类芬顿法降解土壤中罗丹明研究"", 《万方硕士论文数据库》, pages 12 - 51 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102527347B (en) | Magnetic chitosan/cationic surface active agent modified zeolite adsorbent and preparation method and application thereof | |
| JPH1170384A (en) | Alginic acid gel water treatment agent and preparation | |
| Namasivayam et al. | Kinetic studies of adsorption of thiocyanate onto ZnCl2 activated carbon from coir pith, an agricultural solid waste | |
| CN113101895A (en) | Sodium alginate/zirconium hydrogel material and preparation method and application thereof | |
| CN113877304B (en) | Preparation method and application of functionalized deep manganese removal filter material | |
| CN113979527A (en) | Method for synchronously and efficiently removing hexavalent chromium and trichloroethylene combined pollution | |
| CN109453753A (en) | A kind of floating vapor and its preparation method and application | |
| CN114669331A (en) | Fenton-like reagent type non-liquid catalyst and preparation method and application thereof | |
| CN113856623A (en) | Preparation method and application of magnesium chloride modified eucalyptus biochar adsorbent | |
| CN115745137B (en) | Method for treating alkaline wastewater by Fenton system | |
| CN113952923B (en) | Modified micron zeolite and application thereof | |
| CN104860370A (en) | Dye wastewater purification method based on surfactant and silver nanoparticles | |
| CN112844333B (en) | Preparation method of organic phosphine doped polyvinyl alcohol chitosan composite sphere | |
| RU2275335C2 (en) | Filtering material for treatment of water from manganese and iron, method for it preparing and method for treatment of water from manganese and iron | |
| CN101665289B (en) | Treatment method of polymer flooding water of oil field | |
| CN114762815B (en) | Carbonate modified diatomite adsorbent and preparation method and application thereof | |
| US3944687A (en) | Method of preparing purifying agents consisting of activated siliceous porous mineral substances | |
| CN112755960A (en) | Sulfur-modified biochar, preparation method thereof, recyclable sulfur-modified biochar material and application | |
| CN111729662A (en) | Preparation method and application of MXene membrane material for in-situ growth of Bi-MOF | |
| CN115055167B (en) | Hydrogel microsphere for removing copper ions in water and preparation method thereof | |
| CN110813248B (en) | O-dihydroxybenzaldehyde modified shaddock peel adsorbent and preparation method and application thereof | |
| AU2021105707A4 (en) | Method to stabilize transportable mercury in soil | |
| CN117285111B (en) | Environment-friendly water treatment medicament and preparation method thereof | |
| CN115501863B (en) | Magnetic floatable enteromorpha microsphere capable of rapidly removing pollutants as well as preparation method and application thereof | |
| CN103447010B (en) | Modified polyvinyl alcohol-chitosan microsphere mercury removing adsorbent in water system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |